Universal algebra
by George Grätzer.
Princeton, N.J. : Van Nostrand, ©1968.
xvi, 368 págs. ; 24 cm.
Serie: The University series in higher mathematics
"Based on the notes of lectures delivered at the Pennsylvania State University between Oct. 1, 1964 and Nov. 1, 1965."
Bibliografía: p. 330-359.
Reseña: MathSciNet, 40 #1320